Syn- and anti-9-Methoxy(1,4)naphthaleno[3.3]MCP-2,11-diones (4) are obtained by the coupling reaction of 2,6-bis[2-cyano-2-(toluenesulfony)ethyl]anisoles (2) and 1,4-bis(bromomethyl)naphthalene (3) in dimethylformamide (DMF) with an excess of sodium hydride.
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